Enum ParseError 

pub enum ParseError {
    Empty,
    InvalidDigit,
    PosOverflow,
    NegOverflow,
    Zero,
    Signed,
    InvalidRadix,
    Unknown,
}

Enum to store the various types of errors that can cause parsing Big Integer to fail.

Example

use fastnum::U256;

if let Err(e) = U256::from_str_radix("a12", 10) {
    println!("Failed conversion to U256: {e}");
}

Variants

Empty

Value being parsed is empty.

This variant will be constructed when parsing an empty string.

InvalidDigit

Contains an invalid digit in its context.

Among other causes, this variant will be constructed when parsing a string that contains a non-ASCII char.

This variant is also constructed when a + or - is misplaced within a string either on its own or in the middle of a number.

PosOverflow

Integer is too large to store in target integer type.

NegOverflow

Integer is too small to store in target integer type.

Zero

Value was Zero.

This variant will be emitted when the parsing string has a value of zero, which would be illegal for non-zero types.

Signed

Value was Signed

This variant will be emitted when the parsing string has a sign literal, which would be illegal for unsigned types.

InvalidRadix

Invalid radix.

Unknown

Unknown error.

Trait Implementations

impl Clone for ParseError

fn clone(&self) -> ParseError

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ParseError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for ParseError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for ParseError

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<ParseIntError> for ParseError

fn from(e: ParseIntError) -> ParseError

Converts to this type from the input type.

impl From<ParseIntError> for ParseError

fn from(e: ParseIntError) -> Self

Converts to this type from the input type.

impl PartialEq for ParseError

fn eq(&self, other: &ParseError) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for ParseError

impl StructuralPartialEq for ParseError